Coney Island is set to host its first Halloween Parade Saturday along a half-mile route on the boardwalk, with children vying for prizes for best costumes.

The organizer, Councilman Domenic Recchia Jr., said he hoped it would become as big for kids as the local Mermaid Parade is for adults. He said about 100 children had registered so far. Those registering the day of the event must be with an adult.

The parade will start at 12:45 p.m. on the boardwalk behind MCU Stadium, at West 19th Street, and run east to Luna Park, at West 10th Street.

Meanwhile, the Prospect Park Civic Council is hosting what it touts as the city’s “largest children’s Halloween Parade” Sunday in Park Slope.